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Mathematics
Problem
The rational function
h
(
x
)
=
2
x
(
x
2
−
5
x
+
6
)
(
x
+
4
)
h(x)=\dfrac{2x}{(x^2-5x+6)(x+4)}
h
(
x
)
=
(
x
2
−
5
x
+
6
)
(
x
+
4
)
2
x
is defined for all real
x
x
x
except at certain excluded values. Which of the following lists all such excluded values? a)
{
2
,
3
,
4
}
\{2,\,3,\,4\}
{
2
,
3
,
4
}
b)
{
0
,
2
,
3
,
−
4
}
\{0,\,2,\,3,\,-4\}
{
0
,
2
,
3
,
−
4
}
c)
{
−
4
,
2
,
3
}
\{-4,\,2,\,3\}
{
−
4
,
2
,
3
}
d)
{
2
,
3
}
\{2,\,3\}
{
2
,
3
}
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